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Tasklist

FS#36482 - [xorg][nouveau] laptop backlight setting not visible in xorg

Attached to Project: Arch Linux
Opened by Dmitry Shchannikov (rrockru) - Saturday, 10 August 2013, 14:09 GMT
Last edited by Andreas Radke (AndyRTR) - Monday, 20 January 2014, 21:05 GMT
Task Type Bug Report
Category Packages: Extra
Status Closed
Assigned To Jan de Groot (JGC)
Andreas Radke (AndyRTR)
Laurent Carlier (lordheavy)
Architecture x86_64
Severity Medium
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Description:
On my laptop Samsung RV520-S04 with Nvidia GT520M I don't have control on backlight from X session programs such as xrandr, xbacklight.
Since I have /sys/class/backlight/nv_backlight/brightness I can "echo $value >..." to it in a root shell and it actually adjusts LCD backlight level, so it works fine at kernel level.
xrandr shows no backlight control in properties
Similar bug was already fixed at #30798.

Additional info:
* package version(s)
xorg-server 1.14.2-2
xf86-video-nouveau 1.0.9-1
nouveau-dri 9.1.6-1
xorg-xbacklight 1.2.0-1
xorg-xrandr 1.4.1-1
libxrandr 1.4.1-1
linux 3.10.5-1

* config and/or log files etc.
/etc/X11/xorg.conf.d/20-nouveau.conf
Section "Device"
Identifier "nvidia"
Driver "nouveau"
EndSection

Steps to reproduce:
It's hardware related;
This laptop is a Samsung RV520-S04, it has a Nvidia GT520M as sole video card (NO Optimus).
Probably this could be reproduced on another laptop with a nvidia card supported by nouveau, which would set backlight through ACPI.
This task depends upon

Closed by  Andreas Radke (AndyRTR)
Monday, 20 January 2014, 21:05 GMT
Reason for closing:  None
Additional comments about closing:  fixed in nvidiabl, not an official pkg.
Comment by Andreas Radke (AndyRTR) - Saturday, 26 October 2013, 12:49 GMT
if this is still an issue please report it upstream.
Comment by Dmitry Shchannikov (rrockru) - Saturday, 26 October 2013, 12:53 GMT
Fixed with my commit in nvidiabl git repository:
https://github.com/guillaumezin/nvidiabl/commit/b33289ab02c14dac8b6a48bf2a38112feb5faf63
Comment by Andreas Radke (AndyRTR) - Saturday, 26 October 2013, 18:40 GMT
nvidiabl is no official pkg. how is this related?

should backlight control without that additional utility or was the bug in an older version of nvidiabl on your system without that commit?

can we close this bug?
Comment by Dmitry Shchannikov (rrockru) - Saturday, 26 October 2013, 19:50 GMT
Backlight does not worked with nouveau driver and nvidia official driver. With nvidiabl solved problem. It's bug in driver because DSDT fixed by me and it's does not helped.
Comment by Andreas Radke (AndyRTR) - Monday, 23 December 2013, 20:32 GMT
Status?

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